Date the credit facility terminates, in CCYY-MM-DD format.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Description of the interest rate for the amounts borrowed under the credit facility, including the terms and the method for determining the interest rate (for example, fixed or variable, LIBOR plus a percentage, increasing rate, timing of interest rate resets, remarketing provisions).

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityInterestRateDescription
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	na
Period Type:	duration

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

- Details

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- Details

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Namespace Prefix:
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Balance Type:
Period Type:

- Details

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Subsequent Event (Details) - USD ($) $ in Millions	3 Months Ended
Subsequent Event (Details) - USD ($) $ in Millions	Dec. 31, 2018	Sep. 30, 2018	Oct. 17, 2018
Subsequent Event [Line Items]
Line of Credit Facility, Expiration Date		Oct. 17, 2023
Senior Secured Credit Facility [Member]
Subsequent Event [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 675
Subsequent Event [Member] \| Unsecured Debt [Member]
Subsequent Event [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity			$ 1,000
Subsequent Event [Member] \| Minimum [Member] \| Base Rate [Member]
Subsequent Event [Line Items]
Line of Credit Facility, Interest Rate Description	0.00175
Subsequent Event [Member] \| Minimum [Member] \| LIBOR [Member]
Subsequent Event [Line Items]
Line of Credit Facility, Interest Rate Description	0.01125
Subsequent Event [Member] \| Maximum [Member] \| Base Rate [Member]
Subsequent Event [Line Items]
Line of Credit Facility, Interest Rate Description	0.01
Subsequent Event [Member] \| Maximum [Member] \| LIBOR [Member]
Subsequent Event [Line Items]
Line of Credit Facility, Interest Rate Description	0.02